John Flavel
John Flavel (1627-1691) was a Presbyterian clergyman. He was born at Bromsgrove, Worcestershire and studied at Oxford. He was ejected from his living at Dartmouth as a result of the Great Ejection of 1662; however, he continued to preach there secretly. After the Declaration of Indulgence 1687, became a minister of a Nonconformist Church there. He was a prolific and popular author.

On keeping the heart
The heart of man is his worst part before it is regenerated, and the best afterward; it is the seat of principles, and the fountain of actions. The eye of God is, and the eye of the Christian ought to be principally fixed upon it.

The greatest difficulty in conversion, is to win the heart to God; and the greatest difficulty after conversion, is to keep the heart with God. Here lies the very force and stress of religion; here is that which makes the way to life a narrow way, and the gate of heaven a strait gate. Direction and help in this great work are the scope of the text.
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